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DWC Spotting on plants. PICS inside.
- Thread starter PIis3.14
- Start date
WHat is the wattage of your lights and how close are your lights to the plant?
Also ph of the water and water temp and ppm's how often are you testing ph?
also did you take these plants and put them under a stronger light recently? Like switch from fluros to HPS or MH?
Also ph of the water and water temp and ppm's how often are you testing ph?
also did you take these plants and put them under a stronger light recently? Like switch from fluros to HPS or MH?
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PIis3.14
Member
Relief - I am using the Lucas formula. I use distilled and tap water.
General Hydroponics Flora Series Feeding Strategy - Lucas Formula
G-M-B (Grow-Micro-Bloom)
0-5-10 - For Vegetative cycle (18/6)
0-8-16 - For Flowering cycle (12/12)
MynameStitch - I am using 4 26watt 6500k cfls. I keep them a couple inches away from the top of the plants. PH is between 5.6 and 6.2. I don't have appm meter but the water temp is about 84.
Update. I just checked my ph and it was in the 3s. I added some ph up. Hopefully this helps.
General Hydroponics Flora Series Feeding Strategy - Lucas Formula
G-M-B (Grow-Micro-Bloom)
0-5-10 - For Vegetative cycle (18/6)
0-8-16 - For Flowering cycle (12/12)
MynameStitch - I am using 4 26watt 6500k cfls. I keep them a couple inches away from the top of the plants. PH is between 5.6 and 6.2. I don't have appm meter but the water temp is about 84.
Update. I just checked my ph and it was in the 3s. I added some ph up. Hopefully this helps.
Zoltan
Member
Wow... way to be on your toes, you caught that early.
Another couple days with Ph of 3 and..... I shudder to think of it
Are you bubbling the tap water that you use? Cuz chlorine can cause necrotic spots all over the leaves. If you bubble, 24hrs, if let it stand 2-3 days then use.
(bubbling the chlorine out WHILE it is in the DWC bucket does not count!
)
*edit* Oh yeah, hydro... bad Pie... bad! lol
That is why I like soil, so much time to correct things. But then again, so much time for nice big plants.
Another couple days with Ph of 3 and..... I shudder to think of it
Are you bubbling the tap water that you use? Cuz chlorine can cause necrotic spots all over the leaves. If you bubble, 24hrs, if let it stand 2-3 days then use.
(bubbling the chlorine out WHILE it is in the DWC bucket does not count!
)*edit* Oh yeah, hydro... bad Pie... bad! lol
That is why I like soil, so much time to correct things. But then again, so much time for nice big plants.
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You need to check your plants ph regularly few times a day...... once a day would not cut it......
PIis3.14
Member
Alright guys I've been watching the ph and noticed that the plant isn't getting any better. The spots it already has have become worse and it seems to be slowly spreading. Right now the ph is at about 6 +- .4. Also the plant has not grow at at all over the past day or so? Any suggestions?
I'm using half tap/ half distilled with lucas also only in FNB form.
I'm using small amounts in soilless and like you and have been getting the spotting.
I always suspected it was pH spotting but of course hanna makes such a shitty combo meter that the pH part of my 9813-6 died only after 6 short months so now I'm left guessing till my replacement arrives.
Since so many people use lucas or FNB how is everyone else keeping their pH up? I even add dynagro's protekt to up the pH a little.
I mean the 3's is crazy. Why does GH put out a product that drops pH to the 3's . That's crazy.
I've heard the more FNB/lucas you use the more buffering ability it has and the more stable the pH and that just using small amounts of fnb/lucas like you and I are using can indeed cause a more flucuating pH.
I'm using small amounts in soilless and like you and have been getting the spotting.
I always suspected it was pH spotting but of course hanna makes such a shitty combo meter that the pH part of my 9813-6 died only after 6 short months so now I'm left guessing till my replacement arrives.
Since so many people use lucas or FNB how is everyone else keeping their pH up? I even add dynagro's protekt to up the pH a little.
I mean the 3's is crazy. Why does GH put out a product that drops pH to the 3's . That's crazy.
I've heard the more FNB/lucas you use the more buffering ability it has and the more stable the pH and that just using small amounts of fnb/lucas like you and I are using can indeed cause a more flucuating pH.
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PIis3.14
Member
Ok this is weird. When I put my meter half way in my bucket I get a reading of 5.8 but when I put it at the very bottom I get 3.6. WTF? Does this happen to anyone else?
Whatever is wrong with my plant is slowly spreading to the top leaves. Right now about 65% of the lower leaves are being affected. I have attached updated pictures below.
Roots seem fine.
Whatever is wrong with my plant is slowly spreading to the top leaves. Right now about 65% of the lower leaves are being affected. I have attached updated pictures below.
Roots seem fine.
Ok this is weird. When I put my meter half way in my bucket I get a reading of 5.8 but when I put it at the very bottom I get 3.6. WTF? Does this happen to anyone else?
that is funny never heard of that before,....... but if it says 3.6 then something is settling to the bottom and staying there causing the lower reading......
When was the last time you cleaned your system; how you have your setup, DWC? Hydro farm?
What is the ppms of your setup?
Have you tested your water temps? water temps are important....... need to be 65 to 70
that is funny never heard of that before,....... but if it says 3.6 then something is settling to the bottom and staying there causing the lower reading......
When was the last time you cleaned your system; how you have your setup, DWC? Hydro farm?
What is the ppms of your setup?
Have you tested your water temps? water temps are important....... need to be 65 to 70
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Sauron The Blue
Member
maybe phos or mg def?
i get that kinda necrosis when i have a K def, if you start to get purpling stems that may be the case.
i get that kinda necrosis when i have a K def, if you start to get purpling stems that may be the case.
S
strain_searcher
Change your res and add some cal mag
PIis3.14
Member
I am using a DWC setup. I don't have anything to measure ppms. I'm looking at getting a different meter today. Any suggestions? I have emptied my bucket and refilled with freshwater at 100% nute strength. I can't get the ph stable. It has to be my pen. One minute it will read 5.6 but a couple hours later and its in the 6s. Last night I tired to to get a stable ph of 5.8 on a gallon of water. I finally got it but this morning it read 6.2.
Some live by the lucas formula and some say it does not work and end up having the same issue you have; I say the lucas formula only works on certain strains just like certain nutrient requirements.
I would not up anything untill my ph is stable because if tyou add to much and when your ph is stable you will burn them; then have to end up cleaning out the system again.
You need calicum man, and magniseum trust me seen this 100's of times same classic symptoms calicum issue not to mention you have no calcium in your nutrients or not enough of it.
Get a PPM meter, what kind of ph pen do you have? You calbrate it often? Like every 2 weeks? Or you got a self calbration one?
I would not up anything untill my ph is stable because if tyou add to much and when your ph is stable you will burn them; then have to end up cleaning out the system again.
You need calicum man, and magniseum trust me seen this 100's of times same classic symptoms calicum issue not to mention you have no calcium in your nutrients or not enough of it.
Get a PPM meter, what kind of ph pen do you have? You calbrate it often? Like every 2 weeks? Or you got a self calbration one?
PIis3.14
Member
I have a hanna checker 1 pen. I calibrate it weekly. What about adding epsom salt? Also, my system currently is 1 plant and it only takes 5- 6 cups of water to fill. It's not that big so if I have to dump it, it's no big deal.
I think I'm going to switch to distilled and do 100% nute strength tonight. I will add some epsom salt if you think that might help.
I think I'm going to switch to distilled and do 100% nute strength tonight. I will add some epsom salt if you think that might help.
WHat do you mean 100% nute strength?
If you go woith distilled water, you will have to have a micronutrient suppliment, or your problems will get worse.
You can add epsom in the bucket, not problem.
Just a pinch though with the way you got your setup going
If you go woith distilled water, you will have to have a micronutrient suppliment, or your problems will get worse.
You can add epsom in the bucket, not problem.
Just a pinch though with the way you got your setup going
